A 2.4GHz/5.2GHz CMOS power amplifier for dual-band applications

A 2.4GHz/5.2GHz CMOS dual band power amplifier is presented in this work. In order to design high power CMOS amplifier, various power NMOS transistor cells are scrutinized. Considering small signal and large signal characteristics of power NMOS cell, 2/spl times/128/spl times/5/spl mu/m cell is chosen for our dual band PA. A modified macro model is used for the simulation accuracy. As for selecting desired band, there are band-switched matching networks on both input and load of the first stage amplifier, which is followed by NMOS SPDT switch. At 2.4Ghz and 5.2GHz bands, the achieved values of Psat are 9.7dBm and 19.5dBm, respectively. In case of PAE, we obtain 15.3% at 5.2GHz.